大鹏湾为一半封闭海湾，湾内围填海工程必将造成大鹏湾水动力环境的变化。采用二维潮流数学模型MIKE 21 Flow Model_FM，在对潮位、潮流实测数据验证的基础上，从潮流、纳潮量和水交换三个方面分析大鹏湾内围填海工程对大鹏湾水动力环境的影响。模拟结果表明：围填海工程对湾内流场的影响仅限于工程水域附近，工程实施后，流速减幅较大的范围主要发生在围填海工程的北侧，流速减幅在0.01m/s~0.10m/s之间。工程实施将会导致工程及附近海域纳潮量减小，降低了本海域的水体自净能力。此外，工程实施让港区及西部的沙头角海域水体半交换周期增加约27小时。

Mirs Bay is a semi-enclosed bay. The reclamation project in the Bay will cause the change of the hydrodynamic environment. Based on the verification of tidal level and tidal current, the influence of reclamation project of Yantian Port on the hydrodynamic environment of Mirs Bay is analyzed from three aspects of tidal current, tidal prism and water exchange by using two-dimensional mathematical model MIKE 21 Flow Model_FM. The simulation results show that the effect of reclamation on the flow field in the bay is limited to the vicinity of the project. After the implementation of the reclamation project, the larger range of velocity reduction occurs mainly in the north side of the project. The velocity reduction ranges from 0.01m/s to 0.10m/s. The implementation of the reclamation project will lead to the reduction of tidal prism in the sea area near the project, and reduce the self-purification capacity of the water in this sea area. In addition, the implementation of the project will increase the half-exchange period of the water in the harbor area and the western Shatoujiao Sea by about 27 hours.